Automatic charge-heating control for internal-combustion engines



April 19, 1921.

/ 1,625,135" D. P. MOLONY AUTOMATIC CHARGE HEATING CONTROL FOR INTERNAL COMBUSTION ENGINES Filed Oct. 2:5, 1919 %sk&nzlvl 1 F a: L)

]a J a f 6? J9 7 (Juno/M 501 iatented Apr. 19 1927.

DONALD PLUMMER MOLONY. or FLINT,

MICHIGAN, ASSIGNOR T0 MARVEL CAR- BURETER COMPANY, OFVFLINT, MICHIGAN, A CORPORATION or INDIANA.

AUTOMATIC CHARGE-HEATING CONTROL FOR INTERNAL-COMBUSTION E Application -filed october as, 1919'. Serial No. 332,703.

This invention relates to certain new and useful improvements in automatic charge heating control for combustion engines, and is a companion application of one executed of even date herewith; the object being to automatically control the application otheat on the charge delivered to the engine by the amount of vacuum at the throat of the carbureter.

Another object of the invention is to provide a heat control in which a'vacuum chamber is employed having a pipe extending to the throatof the carbureter and provided with a plunger for operating means for controlling the admission of heating fluid to the heating chamber.

Another and further object of the invention is to provide manually operatedmeans for resisting the automatic means in order to allow the heating fluid to pass into the heating chamber for warming up purposes.

With these objects in view. the invention consists of the novel features of construction, combination and arrangement of parts, hereinafter fully set forth and pointed out in the claims.

In the drawings:

Figure 1 is a side elevation of an internal combustion engine partly in section. showing the application of my improved construction of automatic heat control.

Figure 2 is a similar view showing the heating chamber disposed around the throttle or mixing chamber of the carbureter, and Figure 3 is a perspective view of the valve for controlling the admission of the heating fluid to the heating chamber.

. In the drawing, 1 indicates an internal combustion engine having an intake manifold 2, to which is connected the carbureter 3. The en us is provided with an exhaust pipe 4, o the ordinary construction, the above description being given so that the operation of my improved construction of my automatic control can be readily understood.

The intake manifold 2, is surrounded by a heating chamber 5 having an inlet pipe 6 connected to the exhaust pipe 4, and an outlet pi e 7, connected to the exhaust pipe 4, in or er to obtain a circulation of the heating medium. The inletpipe -6 is rovided with a valve 8 for controlling the a mission of the exhaust gases, said valve being carried by the stem 9 having a crank arm 10 isting in the throat of the carburetor will control the position of the plunger in the vaccum chamber which in-turn will control the position of the valve so that the admission of the heating medium to the heating chamber will be automatically regulated. As the suction in the throat. of the carburetor increases the valve is closed so as to cut otl' the supply of exhaust gases to the heater. It will be seen by this construction that the admission of the heat-ing fluid is automatically controlled by the changing vacuum existing in the carburetor or gas delivering duct, as the case may be. as I do not wish to limit myself to any particular point of connection of the vacuum chamber to the carbureter or induction pipe; but I have found in practice that good results can be obtained by connect-ing the vacuum chamber to the throat of the earbureter.

An internal combustion engine provided with the control thus far described will in starting, especially if the engine israced, sometime cut off the admission of heating fluid before the engine has warmed up, and

in order to provide means for resisting the operation of the automatic means I provide the valve stem 9 with a pin 17, which is engaged by a shoulder formed on a collar 18 loosely mounted on the stem and provided with an arm 19 having dash-controlled means 20 connected thereto, whereby the driver can adjust the same so as to hold the valve in open position, in order to allow the full volume of exhaust gases to circulate through-the heating chamber, so that the charge in its passage to the engine will be heated quickly.

In Figure 2, I have shown a similar construction with the exception that the carbureter 3' is provided with a heating chamber 5 surrounding the mixing and throttle chamber thereof, and the operation of the manually and automatically heat control is identical as previously described.

From the foregoing description, it will be seen that I have provided an automatic WE lhSUED charge heating control for internal combustion enginesyso constructed that the amount of vacuum existing in the induction pipe or carburetor automatically controls the admission of the heating medium to the heating chamber, whereby the explosive charge will be heated to the proper temperature, in order to obtain the best results.

What I claim is:

1. An internal combustion engine having an exhaust pipe. intake manifold and carhurcter connected thereto, a heater arranged to heat the charge in its passage from the carbureter to the engine and means actuated by the changing vacuum existing in the carbureting passage of the carbureter for cutting off the supply of exhaust gases to said heater as the suction in the carbureting passage increases.

2. An internal combustion engine having an exhaust pipe, intake manifold and car bureter connected thereto, a heater arran ed to heat the charge delivered to the engine, a vacuum chamber, a connection between said vacuum chamber and the induction pipe leading to the engine below the throttle valve and a plunger working in said vacuum chamber having a connection with means for cutting oflf admission of heating fluid to said heater as the suction in the induction pipe' at the point of connection with the vacuum chamber increases.

3. An internal combustion en ine having an exhaust pipe, intake manifold and carhureter connected thereto, a heater arranged to heat the charge delivered to the engine, said heater having an inlet and outlet pipe connected to the exhaust pi a valve mounted in the inlet pipe, an means for actuating said valve controlled by the changing vacuum existing in the char e delivering duct to the engine below t e throttle valve.

4. An internal combustion engine having acharge forming device, and means for convefi ing the charge to the cylinders thereof, a eater for heating the charge, and means for controlling the admimion of the heating medium to said heater, actuated b the amount of vacuum existi in the car urete ing passage of the charge orming device.

5. An internal combustion en ine having an exhaust pipe, intake manifo d and carburetor connected thereto, a heater for heating the char e in its a bureter to th% engine, aid heater having an inlet and outlet pipe connected to the exhaust line, a vacuum chamber having a pipe extending to the throat of the carburetor a plunger workingin said chamber, a. va ve mounted in the mlet pipe of the heater, and

from the cara connection between'said valve and said plunger for automatically controlling the admission of heating fluid to said heater by the changing vacuum existing in the throat of the carburetor.

6. An internal combustion engine having an exhaust pipe, intake manifold and charge forming device connected thereto, a heater for heating the charge delivered to the engine, said heater having inlet and outlet pipes connected to the. exhaust pipe, a valve for controlling the passage of exhaust gases through said heater and means for actuating said valve controlled by the changing vacuum existing in the carbureting passage of the charge forming device.

7, An internal combustion engine having an exhaust pipe, intake manifold and carbureter connected thereto, a. heater arranged to heat the charge in its passage from the carburetor to the engine, said heater having an inlet and outlet pipe connected to the exhaust line pipe, a valve for controlling the passage of exhaust gases through said inlet pipe, manually operated means for holding said valve in open position, and automatic means for adjusting said valve actuated by the amount of vacuum existing in the carbureting passage of the carburetor.

8. An internal combustion engine having an exhaust pipe intake manifold and carburetor connected thereto, a heater arranged to heat the charge in its passage from the carbureter to the engine, said heater having an inlet and outlet pipe connected to the exhaust line pipe, a valve mounted in the inlet pipe, a vacuum chamber, a pipe extendin from said vacuum chamber to the throat o the carburetor, a plunger working in said chamber, a spring resisting the movement of said plunger, and a connection between said plunger and said valve for automatically controlling the admission of the heating medium to said heater b the amount 0 vacuum existing in the t rout of the carbureter.

9. An internal combustion en us having an exhaust pipe, intake manifo d and carbureter connected thereto, a heater ar; ranged toheat the charge in its passage from the carbureter to the engine having a valve controlled inlet and means actuated by the vacuum existing in the carbureting passage of the carburetor for closi sai valve for cutting oi! the admission 0 heating fluid to said heater as the suction in the carbureting passage increases.

In testimony w ereof I hereunto afix my signature.

DONALD PLUMBER MOLOHY. 

